Harmless pure gas extraction method and double-furnace folding garbage combustion furnace used in same

Abstract

The invention discloses a harmless pure gas extraction method. The method comprises the following steps: burning garbage through a main combustion gasification furnace; drying the garbage before entering a garbage dry distillation furnace by using high-temperature gas, wherein the high-temperature gas is generated through combustion; and baking and performing dry distillation on the garbage in the garbage dry distillation furnace by using high-temperature flame to generate dry distillation gas, wherein the high-temperature flame is generated through combustion. A double-furnace folding garbage combustion furnace used for realizing the harmless pure gas extraction method in the patent claim comprises a furnace body, wherein the furnace body is internally provided with the main combustion gasification furnace and the garbage dry distillation furnace which is externally connected with a negative-pressure vessel; the main combustion gasification furnace is arranged under the garbage dry distillation furnace; the garbage is conveyed and fed into the garbage dry distillation furnace through a sealed garbage conveying chamber; high-temperature gas generated after combustion in the main combustion gasification furnace flows into the garbage conveying chamber.

Description

technical field [0001] The invention relates to a method and system for harmless treatment of waste and utilization of energy, in particular to a method for harmless extraction of pure gas and a double-furnace stacked waste burning furnace used. Background technique [0002] Household garbage is a large amount of waste produced in people's lives. Once it accumulates too much, it will seriously affect people's life and living environment. Therefore, the problem of garbage disposal has become a very important item in environmental protection. At present, the way of garbage disposal has changed from landfill to incineration. In various garbage incinerators, there are many complicated structures in order to prevent air pollution. Therefore, the cost of various garbage incinerators is very high, and many of them cannot Carrying out economical operation, or adding fuel to support combustion, or adding a lot of equipment consumes a lot of electricity. [0003] At present, large-sc...

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Problems solved by technology

[0004] 1. The heat energy utilization rate of the combustion gas is not high, and the waste disposal after combustion is not environmentally friendly: although the gas will consume part of the heat after the boiler function, it still contains a high calorific value, and the rest of the heat cannot be used directly. Discharging into the atmosphere not only wastes energy, but also causes thermal pollution to the environment;

[0005] 2. The heat after burning garbage cannot be used flexibly: the whole garbage is burned, and the heat after burning can only be used in the process of burning garbage at the same time, and cannot be stored for future use.

[0006] 3. Garbage cannot be comprehensively utilized, and its economic value is not high: the overall burning of garbage cannot transform it into other products with higher utilization value

[0007] 4. The equipment is complex, the structure is not compact, and it takes up a lot of space

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